Mold.



No. 764,193, PATENTED JULY 5, 1904. H. N. JASPER, SB. MOLD.

APPLIOATION FILED APB. 23, 1904.

NO MODEL. 2 SHEETS-SHEET 1.

PATENTED JULY 5, 1904,

H. N. JASPER, SB. MOLD.

- APPLIGATION FILED un. as. 1904.

No MODEL. 2 SHEETS-SHEET 2.

Tffj

' @HIM/maj Patented July 5, 1904.

PATENT EricE.

HENRY N. JASPER, SR., OF AKRON, OHIO.

MOLD.

SPECIFICATION forming' part of Letters Patent No. 764,193, dated July 5,1904.

Application filed April 23, 1904.

[o all who/rt it 'may concern,.-

Be it known that l, HENRY N. JASPER, Sr. a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented certain new and useful Improvements in Molds; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the annexed drawings, making a part ofthis specification, and to the letters of reference marked thereon.

The present invention has for its object to provide an expansib'le moldthat may be used in forming articles of artificial stone, concrete,earthenware, or any plastic substance capable of hardening after beingremoved from the mold, and in the present case the mold is especiallyadapted for the manufacture of chimney-blocks substantially of thecharacter embodied in my Pat-ent No. 722,712, dated March 17, 1903.

The invention consists in an ex pansible mold constructed substantiallyas shown in the drawings and hereinafter described and claimed.

Figure l of the drawings is a perspective view of a mold completeconstructed in accordance with my invention; Fig. 2, a perspective viewof the core of the mold; Fig. 3, a sectional elevation of Fig. l; Fig.4, a horizontal section of the core, taken on line 4. 4 of Fig. 3.v

In the accompanying drawings, A and B represent the outer walls of themold, of any suitable material and shape found best adapted to thcpurpose and when in use rests upon a support or platform C, having theconvex surfaces a to give a concave form to the under side or end of thechimney-block or at its ends, the mold herein described being especiallyadapted to the manufacture of blocks of plastic material for theconstruction of chimneys, as shown in my patent hereinbefore referredto. The walls A B are not rigidly connected together at their joints,but are free to be moved outwardly to increase the opening in the moldto facilitate the withdrawal of the molded article. The expansible wallsare held in their normal position in the following manner, which willadmit of Serial No. 204,587. (No model.)

the walls being moved outward independent of each other: Fourright-angle spring-plates D are connected to the end and side walls ofthe mold', each plate being attached by suitable .fastenings c to aportion only of the end wall and the side wall and upon the upper edgethereof, as shown in Fig. l of the drawings, thereby providing means forautomatically throwing out the walls a sufficient distance to enlargethe opening in the mold tofacilitate the withdrawal of the moldedarticle. It should be understood that the plates D are not only ofspring metal, but sufficiently thin to act in throwing outward the wallsof the mold when released, and to insure the perfect action of theplates there are only three fastenings used for each one of saidplatesviz., one at the apex of the angle formed by the arms of theplate, as shown at b, and one at each of the extremities thereof, asindicated at c. This limited attachment of the springplates will allowof that portion thereof between the fastenings to take a slight curve ina downward direction, which is the normal shape ofthe plates when thewalls of the mold are released. slight curve before securing theminplace on the mold, and the limited number of fastenings used will besufcient to hold them in place upon the walls and hold the plates fiatagainst the tendency to assume their original curved form'when the wallsare held against outwardly expanding.

rlhe side and end walls of the mold are provided with wedge-shapebearings E, which extend the entire height of the walls, with whichengages the locking-frame F, as shown in Fig. l of the drawings,suitable stops (Z holding the frame against being disconnected from themold by limiting its upward movement, one of said stops being connectedto each side wall and each end wall of the mold and may be'of anypreferred construction.

In Fig. l of the drawings the outer walls A B, which form together theside and end walls of the mold, are held against expanding by means ofthe locking-frame F, which is tightly held down against the wallsthrough the medium of the wedge-shape ,bearings E, which also draws thewalls tightly together.

The spring-plates D are on a TOO As the locking-frame F is raised torelease the side and end walls A B the spring-plates D will be no longerheld down fiat against the edges of said walls, but will be free toassume their normal form, which is slightly on a curve in a downwarddirection, which will throw out the walls of the mold, and therebyenable the molded article held thereby to be more conveniently removed,after which the lockingframe is ag'ain forced down upon the wedge-shapebearing and the walls of the mold closed together and held until againreleased after the molded article has been completed.

I have now described one portion of the mold comprising the outer wallsthereof, and within these walls is a core which forms the centralopening in the chimney-block and in place of being expansible iscontractible. The core comprises four sections G H I J, as shown in Fig.4 of the drawings, each section forming the corner and a portion of thetwo sides of said core, the sections I J having overlapping' flanges e,which overlap the edges of the two adjoining sections G H to form guidestherefor. Ifdesired,these overlappingflanges e may be a part of theouter metal lining' f of the core by extending the lining beyond theedges of the sections, or the overlapping flanges may be provided in anyother suitable manner found best adapted to the purpose that will serveas guides to the movable sections and also close the joint between theadjacent sections, thereby providing a more perfect and practical corefor the mold. The sections of the core are rendered contractible bymeans of the curved spring-plates K, which are curved in oppositedirections to that of the spring-plates on the side and end walls of themold hereinbefore described, as will be seen by reference to Figs. l and8 of the draw ings, and are connected to the upper edges of the severalsections of the core. As previously stated, the spring-plates K have acurve in an opposite direction to the springplates D. The tendency willbe to draw the several sections G H I J inwardly instead of outwardly,as in the former case, but acting upon the same principle.

The locking-frame F keeps the side and end walls A B securely closedtogether against the action of the spring-plates D. Consequently somemeans must be provided to hold outward the sections of the core againstthe action of the springplates thereon, and one of many means that maybe provided resides in the plunger L, having radial arms M to engagewedge-shape spaces t between the lower edges of the sections of themold, as shown in Fig. 2 of the drawings. IV hen the plunger L iselevated to bring the extremities of the radial arms M in the narrowestportions of the spaces the sections of the core will be held expanded,and by lowering the plunger the sections of the core will be able tocollapse through the medium of the spring-plates connected to thecore-sections, thus admitting the ready and convenient withdrawal of thecore previous to the releasing of the side and end-walls A B of themold. y

It should be understood that the top of the mold and also of the coreare of the same size, whether contracted or expanded, and when the coreis held expanded it will lit tightly in the cavity in the pallet orsupport C, as shown in Fig. 3 of the drawings.

Then using the terms side and end7 walls in describing the mold, thewalls are necessarily sections as well as the sections of the core andshould be so understood, and it is evident that any suitable spring' orsprings that will serve to render the sections of the outer walls of themold and the sections of the core-spring actuated will serve thepurpose; but the spring-plates shown and* described are considered themost simple and practical to render the sections expansible andcontractible, as hereinbefore described.

Any suitable locking means may be employed for holding the side and endwall sections contracted and releasing them when desired, although Ihave shown what I consider the most practical and effective for thepurpose intended, as is also the plunger for hold` ing the sections ofthe core expanded and against collapsing and releasing it in order thatthe sections may contract to render the core more readily removed.

In describing the several details of construction it will be evidentthat many changes or modifications may be resorted to without in anymanner departing from the essential features of the invention#as, forinstance, such changes as would come within the ordinary mechanicaljudgment of the artisan or as experience would bring to the notice ofthose using the mold.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent` is l.r A mold comprising a plurality ofexpansible and contractible spring-actuated sections connected togetherat their upper ends, and means for holding the sections against theaction of the spring and releasing the sections so that the sections maybe acted upon thereby, substantially as and for the purpose set forth.

2. A mold comprising a plurality of expansible and contractiblesections, spring-plates connected to the upper edges of the sectionswhereby the same are connected together and rendered spring-actuated,and means for holding the sections against the action of the springs andreleasing them, substantially as and for the purpose described.

3. A mold comprising a plurality of springactuated sections connectedtogether at their top, wedge-shape bearings secured to the sections andalso stops, and a locking frame around the sections and engaging thewedgeshape bearing to hold the sections closed or IOO IIO

IZO

IO the spaces to expand the sections against the.

action of the spring and to release them whereby the spring may contractsaid sections, substantially as and for the purpose set forth.

ln testimony whereof I aiX my signature in presence of two witnesses.

HENRY N. JASPER, SR.

Vitnesses:

RICHARD WV. REMY, RosE B. REMY.

